Cleaning The Modular Fl Ue Gas Probe; Replacing Probe Preliminary Fi Lter; Replacing Thermocouple - TESTO 340 Instruction Manual

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I.5 Cleaning the modular fl ue gas probe
Probe shafts with preliminary fi lter:
Blow compressed air through the preliminary fi lter. For thorough cleaning, use an
ultrasonic bath or a cleaner for dentures. Screw the preliminary fi lter back on to
the probe shaft after cleaning.
3 Fit a new probe module on the handle and engage it in place.
I.6 Replacing probe preliminary fi lter
The preliminary fi lter in probe modules fi tted with a preliminary fi lter can be replaced.
Unscrew the preliminary fi lter from the probe shaft and screw on a new fi lter.
I.7

Replacing thermocouple

Detach the fl ue gas probe from the measuring inst-
rument before cleaning.
1 Release the probe catch by pressing the key on
the probe handle and remove the probe module.
Probe shafts with preliminary fi lter:
Unscrew the preliminary fi lter.
2 Blow compressed air through the fl ue ducts of the
probe module and probe handle (see illustration).
Do not use a brush!
1 Release the probe catch by pressing the key on
the probe handle and remove the probe module.
2 Detach the plug-in head of the thermocouple
from its mounting using a screwdriver and pull the
thermo couple from the probe shaft.
3 Lead a new thermocouple into the probe shaft until
the plug-in head engages.
4 Fit probe module on the handle and engage it in
place.
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